take away one picture of a man in a baseball cap, that nbc news has learned has been distributed to law enforcement agencies. apparently that video, taken on the official cameras. the surveillance cameras, a local department store. show a man acting suspiciously and dropping a bag in the same area as the second bomb. this is the same place where the local tv station, whdh, had the photographs. one showing what seemed to be almost a garbage bag or grocery store bag. and afterwards, the explosion that went off. there is a manhunt on right now to identify that person in the video. we are told that the company that manufactured is cooperating. they will try to trace where it might have been sold. everything down to the wires that were used. many of them commonly available. less common may be the circuit board that investigators believe they have been used as a timing device. so, all of that is being investigated, trying to be traced, every, single component part. while investigators are still on the scene, even though it has -- they are going over every inch. i wanted to update you quickly,